Pinknblack

So I'm just getting around to PRO, my friend has been playing, giving great reviews for you guys I downloaded the 64 AND 32 bit files to make sure it wasn't me.. I can't open them. I can't find insturctions on what to do witha .rar file, windows 10 is just sort of.. going crazy? I downloaded an uncompressing thing, but it always says 'unable to uncompress' Help? please